Sweep all .cshtml files for encoding corruption; add pre-commit guard

Replace all corruption variants with HTML entities across 226 view files:
- 3-char UTF-8-as-Win1252 sequences (ae-corruption)
- Standalone smart/curly quotes that break C# Razor expressions
- Partially re-corrupted variants where the 3rd byte was normalised to ASCII

tools/Fix-Encoding.ps1: re-runnable sweep; uses [char] code points so the
script itself never contains a literal non-ASCII character; supports -DryRun

.githooks/pre-commit: blocks commits containing the ae-corruption byte
signature (xc3xa2xe2x82xac); git core.hooksPath = .githooks so the
hook is repo-committed and active for all future work on this machine.

Build clean; 225 unit tests pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Views/Equipment/Create.cshtml

@@ -4,7 +4,7 @@
     ViewData["Title"] = "Add New Equipment";
     ViewData["PageIcon"] = "bi-tools";
     ViewData["PageHelpTitle"] = "Add New Equipment";
-    ViewData["PageHelpContent"] = "Equipment records track physical assets in your shop — ovens, spray booths, compressors, and other machinery. Enter a name, type, and location at minimum. Serial number and warranty details help with service claims. The maintenance interval drives the Next Scheduled date shown on the equipment list.";
+    ViewData["PageHelpContent"] = "Equipment records track physical assets in your shop — ovens, spray booths, compressors, and other machinery. Enter a name, type, and location at minimum. Serial number and warranty details help with service claims. The maintenance interval drives the Next Scheduled date shown on the equipment list.";
     var statusList = ViewBag.StatusList as Array ?? Array.Empty<object>();
 }